218156201 has 8 divisors (see below), whose sum is σ = 222475680. Its totient is φ = 213879168.

The previous prime is 218156149. The next prime is 218156227. The reversal of 218156201 is 102651812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218156201 is a prime.

It is a super-3 number, since 3×218156201³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (218156231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131 + ... + 20888.

It is an arithmetic number, because the mean of its divisors is an integer number (27809460).

Almost surely, 2^218156201 is an apocalyptic number.

It is an amenable number.

218156201 is a deficient number, since it is larger than the sum of its proper divisors (4319479).

218156201 is a wasteful number, since it uses less digits than its factorization.

218156201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21223.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 218156201 is about 14770.1117463613. Note that the first 3 decimals coincide. The cubic root of 218156201 is about 601.9898757693.

The spelling of 218156201 in words is "two hundred eighteen million, one hundred fifty-six thousand, two hundred one".